trans-1,2-Dichloroethylene
Green Acres W/a-south
1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 60 ppb
The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for trans-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-20 | 180321-001VO | ND |
| 2018-04-24 | 180425-014VO | ND |
| 2018-08-06 | 180807-005VO | ND |
| 2018-10-29 | 181030-005VO | ND |
| 2019-02-19 | 190220-002VO | ND |
| 2019-04-23 | 190424-013VO | ND |
| 2019-08-05 | 190806-004VO | ND |
| 2020-03-04 | 200304-003VO | ND |
| 2021-02-08 | 210209-015VO | ND |
| 2021-05-17 | 210518-008VO | ND |
| 2022-01-12 | VO-220113-005 | ND |
| 2023-03-13 | VO-230314-002 | ND |